Aib and gas  valve



E. F. FISHER. AIR AND GAS VALVE.

APPLICATION FILED OCT. 22, 1915.

Pategted Aug. 22, 1916.

ATTORNEY I ELMER F. FISHER, OF SPRINGFIELD, IVLASSACHUSE' ETS.

AIR AND VALVE.

Specification of Letters Iatent.

n osccr.

Original application filed March 16, 1915, Serial No. 14,838.

eivmed and this application filed October 22,

1915. SerialNo. 57,311.

To all whom it may concern:

lie it known that I, ELMER F. Fianna, a citizen of the United States of America, residing at Springfield, in the county of Ilampden andiitate 'of ltlassachusetts. have invented a new and useful Air and Gas Valve. of which the following is a specification, this application being a divisional part of an application filed by me in the United States Patent ()tlice, March 16, 1915, Serial No. 14,838, for Letters Patent on a heating appliance.

Myinvention relates to improvements in valves designed to admit both air and s to the burners of boilers of various types and other heaters. and consists of certain peculiar, automatic, air-controlled, airand gas valve members connected together, and arranged and adaptedto admit a supply of a" and gas to the burner and to shut off such supply, together with such auxiliary and subsidiary parts and members as may be needed or desired in order to render the valve practicable and eflicient in every respect, all as hereinafter set forth.

An object of my invention is to provide a valve, whicl is simple in construction and operation, for supplying air and gas in proper proportions and economically to a burner. Y

A further object is to utilize the'air supply with which to open the gas valve, or with which directly to control said valve.

'lhisvalve can be used to advantage with a great variety of burners and tl'iereforc has a. broad field of application, which is an important advantage. Said valve, furthermore, meat.

Other objects and advantages will appear in the course of the following description.

I attain the objects and secure the advantages of my invention by the means illustrated in the accompal'iying drawings, in which- L Figure 1 is a vertical section through a valve. or valve mechanism and connected parts and members wherein is embodied a practical form of my invention. the valve members being shown closed in full lines and open by dotted lines, and, Fig. .2, a side elevation ofthe gas valve.

Similarnumerals designate similar parts thrbughout the several views.

Although this valve is particularly well equally well adapted for other kinds of heaters,

is susceptible of very close adjustadapted for use in connection with tubular steam boilers forhouseheating purposes, it

use with hotwater heaters, hot-air furnaces, stoves, and hence the scope of said valve inthe matter of practical application is in no sense limited by reason of the variations which exist in heaters and their grates. l have here represented the valvein rmmection with fragmentary parts of a tubular steam boiler and the grate therein. It 15 1 0 be understood that the air, which is admitted to this valve and by the latter to the heater, and which also is utilized for opening the gas valve member to admit the gas with the air to said heater, is introduced under forced draft, any suitable well-known power-driven fan, pump, or suction device being employed to introduce such air under pressure This air supply not only opens the' gas valve member, but also holds it open, and pcrruitslhe same to close, and at the same. time controls the air valve member by means of which the volume of air itself is controlled, as will presently appear.

In the "first view a small portion of a tubular steam boiler is represented at 1, and a fragu'ient of a. gas burner at 2 with a perforated plate 3 beneath, a mixing chamber, wherin are commingled the gas and air-to be burned above said burner, being represented at t.

A perforated, tubular, pilot-light burner 5 is set in the casing, of the boiler 1, with the per-forated-port1on ust abovetlle adjacent part of the burner 2, and opening out side of said casing. Normally a small flame or nlotdight is maintained by the burner 5 all the time, and the instant the burner 2 1s supplied with fuel the latter is ignited from.

said pilot-light, in the customary manner. A. gas-sup ply pipe isrepresented at 6, and a small conduit Tleads from that to the vicinity of the. open outer end of the burner 5. The conduit-7 opens at the bottom adjacent to the outer endof the burner 5, as shown at 8, there being sufficient space between the two members for the necessary amount ofair to enter said burner with the gas from said conduit. as long as the flame is maintained at the inner or perforated terminal of the burner 5, the fuel is supplied thereto, and no gas'escapcs on the way from the outlet-8 to said burner into the surrounding atmosphere. The conduit 7 is provided with a Patented An 22, 1916..

valve 9 as usual. There is, of course, nothing new about the pilotlight.

A hollow elbow 10, constituting a primary mixing or fuelsupply chamber 11", opens at one, end into one side ofthe'mixing chamber 4 in the bottom of the boiler 1 as represented at 12.

A vertical" gas-inlet member, 13 is secured to the elbow 10, partly within and partly without the same, and into the open end at the base of said elbow is screwed an air-inlet member which, in the present case, takes the form of a coupling 14. An airsupply pipe 15 has one end connected with the coupling '14 and the other end connected with a suction or forced-draft generating element or device, such as the blower repre-. sented in the herein'before-mentioned application. The upper terminal of the coupling "14, inside, is made flaring, as shown at 16.

ing upwardly into the coupling 19. The

valve 20 is provided on the underside with a .hollow 0pen-bottom guide 21 and a long stem 22. The guide 21 has a sliding fit in the vertical part of the passage 18 and serves to center the valve 20, and said guide is provided in the sides directly under said. valve 'with one or more openings 23, through -which the gas passes from the coupling&q19

lie "valve stem 22 passes downward from the valve 20' through the axial ceuters'of the when said valve is raised from its seat. a

guide 21', the vertical part of the passage 18, and the base of the member 13, into the coupling 14, said stem being adapted titslide freely in the vertical passage provided for it in said base. I

The parts and members are so arranged that the stem or rod 22 is in line with the axial center of the coupling 14. The rod 22 is provided with a stop to limit the upward 'rise thereof and of the valve 20, such. stop here consisting of a nut 24 scrcwedp-Ii to said rod below the base of the member.

When the valve 20 is opened the nut or stop 2% comes into contact with the member 13, and solimits the upward movement of the parts, and serves to determine the amount of gas admitted through the openings 23, provided'such stop he so positioned on the stem 22 as to contact with said member before said openings are carried entirely, clear of the valvescat 17. The stop is adjustable on the screw-threaded portion of the valve stem. A. checlc-m1t 25 is provided on the rod 22 for the stop 24. Thestem 22 is pro vided with an air valve or air-valve member.

mixture is ignited at the burner 5. This issues? of theloose piston type, such valve here being inthe form of a disk 26 screwed on to that portion'ot said stem which extends into the couplinglli The disk or air valve member 26, like thestop 24, is adjustable on the i valve stem, and a check-nut 27 is provided on saidstem for said valve. The diameter of the valve member 26 should be a little less than the interior diameter, below the flaring parts 16, of the coupling 14. V lhe air injected into the pipe 15 and the coupling 14, by being blown 'or sucked in by any suitable means and inany suitable mannor, as hereinbefore stated," comes into 0011- tact with the valve member 26, raises the same, and so causes the gas-valve 20 to be lifted, through the medium of the stem'22, tram the Va ve-seat 17, and gas to be admit ted from the coupling 19 to the chamber 11,

through thejopenings 23, guide 21, and passage 18. Thus both gas and air are admits ted to the chamber -11 at the same time. The two elements co'mmingle in-thechamber 11 and immediately pass through the outlet into the large mixing chamber 4 below the and the burner 2. i As soon as the -1etso as to increase the open space, between the valve member 26 and the flaring walls 16, when said member is raised by the'air, and said supply may be decreased by screwing up said coupling so as to decrease such space when said valve is raised. Likewise, by locating the member 26 higher on. the stem. 22 the volume of the air supply to the chamber 11 is increased, and by locating said member lower on said stem such volume is decreased. Thus Iprovide a double adjustment or twoadjustments for regulating the air supply. a i v The operation as: a whole of the valve is described as follows: Asa preliminary the valve 9 is opened and the gas or gas and air pilot-light burns continuously until such time as the valve 9 may again be closed. Air is admitted to and forced through the pipe 15 and the coupling 14 into the chamber 11. In entering the chamber 11 the air encountore the disk 26 and elevates said disk and with it the rod 22 and the valve 20 into'the position indicated by the dotted lines in Fig. 1. When the valve 20 is raised from its seat, the way to the chamber 11 is opened, through the openings. 23, the guide 21, and the passage 18, so that gas immediately passes from the coupling 19 to said chamber. In the chamber 11 the air and gas connningle and pass into the chaim 5";mrature continues to fall .26 is a ain raised and the being located valve, axially,

her 4 wherein they are still more thoroughly mixed. The fuel mixture in the chamber 4 rises through the burner 2, and then rises through the burner orifices 29. As soon as the fuel mixture reaches the top of the burner 2 it iscuts oil, diminlshes, or diseontinues the force that supplies the air to the pipe 15. so there is little or no pressure beneath the disk 96,

and said disk and connected parts drop and shutoff the gas from the chamber 11. 'ithout further gas and air supply for the burner 2, combustion above orat such. burner must and does cease. There is now no consumption of gas except the small amount consumed by the pilot-light.

Without the heat at the burner 2 the tempcraturc of the boiler falls, and such temuntil the suction or forced-draft, that is, the air pressure in the pipe 15,.is reestablished, when the disk valve member 20 reopened, resulting in the delivery to the burner of a further supply of gas and air. This cycle of events may and in practice will be repeated indefinitely.

lVhcn the valve is used in connection with an oileburning appliance the air is sucked into a chau'rber such as the chamber 11. instead of being blown intothe same.

Various changes or modifications in the shape, size, arrangement, and construction of some or all of the parts of the valve may be made without (le 'iarting from the nature of the invention.

I hat I claim as my invention, and desireto secure by Letters Patent 15- 1. In an air and gas valve, a hollow member having an air inlet and a gas inlet which are remote from each other, and also having an air and gas outlet, said gas inlet ha ving a valve-seat, and said air and gas outlet approximately intermediate of said. air inlet attached valve for said seat, said valve be ing arranged to open against the'gas pressure, and provided with tendsintosaid air inlet, and a valve member on said stem in said air inlet and adapted to operate freely therein, said valve member being unattached except to said stem, and the arrangement of parts being suchthat air, in passing into and through the inlet therefor, impinges directly on said valve member, and moves the same with said stem and gas to make a passage for itself past said valve member and open said gas valve.

; 2. In an air and gas valve, ahollow memthe plate openings 28 to.

- latter, and impinges and sald valve-seat, an una stem which ele.

her having anair inlet provided with an adjustable flaring member, and also having a gas inlet with a valve-seat, and an air and gas outlet located approximately intermediate of said air inlet and said valve-seat, said inlets being remote from each other, an unattached gas valve for said valve-seat, said valve being arranged to open against the gas pressure, and provided with a stem which extends into said flaring member, and

a valve member on said stem in said flaring member, said 'valve member being unattached except to said stem. and the arrangement of parts being such that air, in passing into and through said flaring member, is regulated in volume by the position of the directly on said valve men-iber, and moves the same, with said stem and gas valve, axially, to make a passage for itself past said valve member and open said gas valve.

3. In an air and gas valve, a hollow me1nher having a flaring air inlet and a gas inlet which are remote from each other, and also having an air and gas outlet, said gas inlet having a valve-seat, and said air and gas outlet being located approximately intermediate of said air inlet and said valve-seat, an unattached valve for said seat, said valve being arranged to open against the gas pres sure, and provided with a stem which extends into said air inlet beyond the flaring portion thereof, a valve member on said stem in said air inlet and adapted to operate freely therein, said valve member being unattached except to said stem, and means to adjust said valve member on said stem, the arrangement of parts being such that air, in passing into and through the inlet therefor, is regulated by the position of said valve member on said stem, and impinges directly 011 said valve member, and moves the same, with said stem and gas valve, axially, to make a passage for itself past said valve 'member and open said gas valve.

4. In an an and gas valve, a hollow member having an air inlet and an air and gas outlet, a gas-inlet member provided with a valve-seat, and'opening outside through said seat and inside intosaid hollow member, at a point remote fromsaid air inlet, said air and gas outlet in saidhollov member being located approxin'iately intermediate of said air inlet and said valve-seat, an unattached valve for said seat, said valve being arranged to open against the gas pressure, and provided with a steni which extends through said gas-inlet member into said air inlet, a valve member on said stem'in said air inlet and adapted to operate freely therein, said valve member being unattached except to said stem, and a stop on said stem in posigt ionr to "contact With said gas-inlet member [aiid limit the valve-opening movement, said gas "valve and valve member being gmoved 1 axially, by the air in passing tliriiii gh' the inlet therefor and impinging directly on said 'vzllve member, to make a passage for sa d air an apertured g ide to slide in said passage,

against the galpressuremnd provided with and with a ste which extends through said gas-inlet member, without obstructing the gas-Way through said guide and passage, into said air inlet, and a'valve member on said stem in said air inlet and'adapted to operate freely therein, said valve member being unattached except to said stem, and 'said' gas a valve and valve memberbeing moved ax-. ially, by the air in passingthrough the inlet therefor andimpinging directly on said valve member, to make a passage for said.

air pasts-aid valve member and open said valve-seat.

(3.The combination with a heater pr0- vided with a ,burner,'and having a mixing chamber under said burner, of an. a" and gas valve comprising a hollow member having an air inlet and a gas inlet which are .remote from each other, the latter having a valve-seat, and said member openingkit a point approximately intermediate of said air inlet and said valv -seat into said mix- 'ing chamber, an unattached valve for said seat, said valve being arranged to open against the gas pressure, and provided with a stem which extends intosaid air'inlet, and

a valve member onsaid stein in said inlet and I a w I adapted to operate freely therein, said valve member heing nnattaehed except to said stem, and the arrangenientiof parts being suchthat the air, in passing through the inlet therefor, impinges directlyon said valve member, and moves the same, with said stem and gas valve, axially, to make a passage for itself past said valve member and open said gas valve y 7 ELMER F. FISHER. Witnesses: I

F, A. CUTTER,

Lew s, 

